I like that you can shred or burn with no mess - easy to use, very little waste paper left over after shredded/burned (which makes sense).
Some of our clients have specific requirements for their documents being destroyed so we are required by law to destroy them using this method which has been perfect thus far! It's also great when they need us at short notice because it doesn't take long once set up before starting work. Nothing really but as above if its an urgent requirement then there isn't much else out there thats quicker than doing things manually!!